Hi list, I converted one old FreeBSD 4.9 box to HVM domU (with AMD-V processors, with Intel-VT doesn''t work). All works fine, but disk performance is too poor... about 8MB/s (in dom0 i get about 40MB/s). I did some test with VBD with file backed and LVM but performance stills poor. Any advices? Is possible to use blktap in this case? Any pointers? If I use a SAN, network performance on HVM will be a problem? What''s about tgt? I have one HVM old linux 2.4 domU and I can get far more disk troughtput than with FreeBSD, it is normal? In this case, domU is on Intel-VT Xen server, is Intel-VT io implementation better than AMD? At now, I''m only testing, in the future I will need to virtualize some old FreeBSD servers with quite great IO demand Many thanks, Marc _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Mon, Oct 01, 2007 at 01:48:41PM +0200, Marc Patino Gómez wrote:> Hi list, > > I converted one old FreeBSD 4.9 box to HVM domU (with AMD-V processors, > with Intel-VT doesn''t work). All works fine, but disk performance is too > poor... about 8MB/s (in dom0 i get about 40MB/s). I did some test with > VBD with file backed and LVM but performance stills poor. > > Any advices? > > Is possible to use blktap in this case? Any pointers? > > If I use a SAN, network performance on HVM will be a problem? > > What''s about tgt? > > I have one HVM old linux 2.4 domU and I can get far more disk troughtput > than with FreeBSD, it is normal? In this case, domU is on Intel-VT Xen > server, is Intel-VT io implementation better than AMD? > > At now, I''m only testing, in the future I will need to virtualize some > old FreeBSD servers with quite great IO demand >You need to install PV (paravirtual) xen aware device drivers into FreeBSD.. I don''t know if there is such thing.. -- Pasi _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi Pasi, thanks for your answer. Any pointers to do this? Regards, Marc Pasi Kärkkäinen wrote:> On Mon, Oct 01, 2007 at 01:48:41PM +0200, Marc Patino Gómez wrote: > >> Hi list, >> >> I converted one old FreeBSD 4.9 box to HVM domU (with AMD-V processors, >> with Intel-VT doesn''t work). All works fine, but disk performance is too >> poor... about 8MB/s (in dom0 i get about 40MB/s). I did some test with >> VBD with file backed and LVM but performance stills poor. >> >> Any advices? >> >> Is possible to use blktap in this case? Any pointers? >> >> If I use a SAN, network performance on HVM will be a problem? >> >> What''s about tgt? >> >> I have one HVM old linux 2.4 domU and I can get far more disk troughtput >> than with FreeBSD, it is normal? In this case, domU is on Intel-VT Xen >> server, is Intel-VT io implementation better than AMD? >> >> At now, I''m only testing, in the future I will need to virtualize some >> old FreeBSD servers with quite great IO demand >> >> > > You need to install PV (paravirtual) xen aware device drivers into FreeBSD.. > > I don''t know if there is such thing.. > > -- Pasi > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users